/*
 * Copyright 2013-2018 Lilinfeng.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.phoenics.teacher.itheima.netty.protocol.netty.server;

import com.github.phoenics.teacher.itheima.netty.protocol.netty.MessageType;
import com.github.phoenics.teacher.itheima.netty.protocol.netty.struct.Header;
import com.github.phoenics.teacher.itheima.netty.protocol.netty.struct.NettyMessage;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import lombok.extern.slf4j.Slf4j;


/**
 * @author Lilinfeng
 * @version 1.0
 * @date 2014年3月15日
 */
@Slf4j
//public class HeartBeatRespHandler extends ChannelHandlerAdapter {
public class HeartBeatRespHandler extends SimpleChannelInboundHandler<Object> {

    //private static final Log LOG = LogFactory.getLog(HeartBeatRespHandler.class);


    @Override
    public void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {
        if (!(msg instanceof NettyMessage)) {
            return;
        }
        NettyMessage message = (NettyMessage) msg;
        // 返回心跳应答消息
        if (message.getHeader() != null
                && message.getHeader().getType() == MessageType.HEARTBEAT_REQ
                .value()) {
            log.info("Receive client heart beat message : ---> "
                    + message);
            NettyMessage heartBeat = buildHeatBeat();
            log.info("Send heart beat response message to client : ---> "
                    + heartBeat);
            ctx.writeAndFlush(heartBeat);
        } else
            ctx.fireChannelRead(msg);
    }

    private NettyMessage buildHeatBeat() {
        NettyMessage message = new NettyMessage();
        Header header = new Header();
        header.setType(MessageType.HEARTBEAT_RESP.value());
        message.setHeader(header);
        return message;
    }

}
